From caaa6d737b6893fccd38b03e07b6e71f36238b7a Mon Sep 17 00:00:00 2001
From: z4root <usersolo1@protonmail.com>
Date: Fri, 30 Oct 2026 23:44:58 +0000
Subject: [PATCH 1/2] feat(katas): add the solution

---
 Katas/CP/perfect_sanduches/src/solution.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 Katas/CP/perfect_sanduches/src/solution.cpp

diff --git a/Katas/CP/perfect_sanduches/src/solution.cpp b/Katas/CP/perfect_sanduches/src/solution.cpp
new file mode 100644
index 0000000..ce136a6
--- /dev/null
+++ b/Katas/CP/perfect_sanduches/src/solution.cpp
@@ -0,0 +1,19 @@
+#include <iostream>
+
+int min(int a, int b) { return (a > b) ? b : a; }
+
+int main() {
+  int t, a, b;
+  std::cin >> t;
+
+  for (int i = 0; i < t; i++) {
+    std::cin >> a >> b;
+    if (b >= a) {
+      std::cout << "-1" << std::endl;
+    } else {
+      std::cout << min(b, a - b) << std::endl;
+    }
+  }
+
+  return 0;
+}

From 62e28f6afc895cff21b3d2ce22f6e67c76adabd8 Mon Sep 17 00:00:00 2001
From: z4root <usersolo1@protonmail.com>
Date: Fri, 30 Oct 2026 23:51:46 +0000
Subject: [PATCH 2/2] feat(katas): add the test

---
 Katas/CP/perfect_sanduches/test/expected1.txt | 3 +++
 Katas/CP/perfect_sanduches/test/input1.txt    | 4 ++++
 2 files changed, 7 insertions(+)
 create mode 100644 Katas/CP/perfect_sanduches/test/expected1.txt
 create mode 100644 Katas/CP/perfect_sanduches/test/input1.txt

diff --git a/Katas/CP/perfect_sanduches/test/expected1.txt b/Katas/CP/perfect_sanduches/test/expected1.txt
new file mode 100644
index 0000000..2c62db2
--- /dev/null
+++ b/Katas/CP/perfect_sanduches/test/expected1.txt
@@ -0,0 +1,3 @@
+2
+1
+-1
diff --git a/Katas/CP/perfect_sanduches/test/input1.txt b/Katas/CP/perfect_sanduches/test/input1.txt
new file mode 100644
index 0000000..8598bbd
--- /dev/null
+++ b/Katas/CP/perfect_sanduches/test/input1.txt
@@ -0,0 +1,4 @@
+3
+6 4
+5 1
+4 5